The so-called "deadly tick" virus was first detected in China in 2009 and it sprung up in Japan in January of this year.
Japanese media outlets have reported seven people in Japan have died from the virus.

Health authorities now say this virus has been discovered on ticks in Korea.
The Korea Centers for Disease Control and Prevention says the "severe fever with thrombocytopenia syndrome" virus or SFTS virus was found on this species of tick called the haemaphysalis longicornis.
Officials say the virus was detected during a recent nationwide inspection.
They stress the virus has not spread to a dangerous level, but they are advising citizens to be aware.
The tick is usually found in hills and fields and is active between April and November.
If bitten by a virus-carrying tick, patients can suffer from high fever, vomiting, diarrhea--- and in the worst case death.
The virus has a mortality rate of between 12 to 30 percent.
Although there were cases of death in China and Japan, local authorities say there have been no cases of human infection here in Korea---
However, they are advising citizens to wear long sleeves and pants when going out into the mountains or into fields to avoid getting bitten by a tick.
Connie Lee, Arirang News.